True Type Font Parsing Elevation of Privilege Vulnerability



Published: 2016-12-13
Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-7182
CWE-ID CWE-119
Exploitation vector Local
Public exploit Public exploit code for vulnerability #1 is available.
Vulnerable software
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Microsoft Office
Client/Desktop applications / Office applications

Word Viewer
Client/Desktop applications / Office applications

Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Microsoft Lync
Client/Desktop applications / Messaging software

Lync Attendee
Client/Desktop applications / Messaging software

Microsoft Live Meeting
Client/Desktop applications / Messaging software

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Privilege escalation

EUVDB-ID: #VU975

Risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2016-7182

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: Yes

Description

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists due to boundary error in the Microsoft Windows kernel-mode driver (Win32k). By running a malicious program on the affected system attackers can execute arbitrary code with SYSTEM privileges.

Successful exploitation of the vulnerability may result in a complete system compromise.

Mitigation

Install updates from Microsoft website.

Vulnerable software versions

Microsoft Office: 2010

Windows: 7 - Vista

Windows Server: 2008 - 2008 R2

Word Viewer: 2007

Microsoft Lync: 2010 - 2013

Lync Attendee: 2010

Microsoft Live Meeting: 2007 Console


CPE2.3 External links

http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2016-7182

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website or open a file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.



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